Leonardo DiCaprio is well established as a Hollywood star, but that doesn't stop him being to big to admit that he's a huge "fan" of his 'J. Edgar' co-star Dame Judi Dench.
In the J Edgar Hoover biopic, British actor Judi plays Leo's over-bearing mother, but while the cameras were off, Leo said that she was "a sweetheart".
According to the Press Association, the 35-year-old said: "She's a sweetheart, she couldn't be more lovely. But as soon as the cameras start rolling and you hear that voice, it's powerful."
Leo continued: "We had a scene where I am freaked out, stuttering, and her voice just froze my spine. She has a way of commanding a scene in a room, and it's just astounding."
Talking about his lead role in the Clint Eastwood flick, Leo said: "This was one of the most challenging characters I'd ever seen on the page, and it was terrific to breathe life into this person, because he was such a mystery."
"Hoover was incredibly ambitious as a young man. He was highly motivated to succeed in Washington, primarily due to his mother's expectations of him."
J Edgar opens in cinemas on Friday January 20.
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